I get that the s2 teaser has reignited the whole 'Ed is/isn't literate' wank, but it'd be nice if fandom could remember that literacy is a spectrum.
It may help to think of it as learning a foreign language. That also comes with degrees of fluency depending on how much time/practice/effort you put into it.
Can I read a menu in a German restaurant and know what I do or don't want to order? Sure. Can I read and understand a German legal contract? Hell no.
We do not need 'Stede teaches Ed to read' or 'Ed needs Izzy to read and write ship's logs' because 😬 We also do not need pushback against tropes like that that veer into what I hope is unintentional classism and xenophobia, where of course Ed has high literacy in English because he's a genius and would've obviously taught himself to read and write complex English texts. Going 'well of course this genius character has high literacy in English' is also kinda 😬.
I emphasise the English bit also because we are shown Jim writing in Spanish, but we don't know exactly how fluent they are in reading and writing English. They can read the wanted poster. Maybe they are not as fluent and literate in English as they are in Spanish, and that's fine. It does not make Jim any less intelligent.
Canon shows repeatedly that high literacy in general and high literacy in English specifically have nothing to do with someone's intelligence. It would be nice if fandom remembered that.
(And let's be real, if you want to talk about OFMD and representation, having characters who have low literacy but are successful and skilled in their profession also counts!)
I know this is a tiny part of the wider problems born of diet culture, fatphobia, classism, and racism but like god the idea that "healthy" food must inherently taste bad has completely ruined us as a society.